AVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data this morning at 10:58 AKDT (18:58 UTC). There are no recent satellite views since the detected explosion, but earlier views are obscured by clouds at about 30,000 feet above sea level.

(12) Volcanic cloud height:

Unknown.

(13) Other volcanic cloud information:

Unknown

(14) Remarks:

Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.

Volcanic Activity Summary:AVO detected an explosion at Cleveland Volcano in both infrasound (air pressure) and seismic data this morning at 10:58 AKDT (18:58 UTC). There are no recent satellite views since the detected explosion, but earlier views are obscured by clouds at about 30,000 feet above sea level.

Remarks: Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.